Is the manual for the HI 1000 WI still available?

I have a customer with a panel mount Hardy instrument with 1000WI on the front.  The instrument needs to be re-calibrated but they don't have the information on how to set-up and calibrate it.  Can I get that information?

The HI 1000WI is over 20 years old. Attached to this answer there is a scanned copy of the manual for your review.